In the "First World Problems" category...
I just got emailed that my 41P suppressors were all approved at once. I didn't expect them until June! Needless to say, I haven't got a single host set up yet. I've got a .22 Spectre II, a 7.62 Specwar, and a .45 Osprey all waiting to be picked up. I've already got plans for the rifle can, and I'm going to have to send a couple .22's out to be threaded as well. This post concerns the Osprey.
For available hosts, I've got a Sig Carry 1911, a Sig Mk 25, and a CZ P09. Through thorough lack of planning, I don't have a threaded barrel for any of them. Factory barrels are available for all three, but I don't really want to spend the money on all three right now. I want to get just one at first, and then the other two later down the road. Whichever I choose is going to be the dedicated HD pistol, to go along with the AR 15 pistol that the Specwar is going to be mounted to. I actually shoot the P09 better than the Mk 25, but I also just got the E2 grip and SRT trigger for the Mk 25 in the mail. I haven't even installed them yet - they JUST came in. (Yeah, it's like Christmas in April!)
Given all the above, what makes more sense to buy a threaded barrel for first? The 1911, the Mk 25, or the P09?